Fix compatibility with rendercanvas 2.4.0 (#768)

* Fix compatibility with rendercanvas 2.4.0

I think there might be more places but now my application runs again

* use context where it makes sense

---------

Co-authored-by: Almar Klein <almar@almarklein.org>

Author: hmaarrfk

examples/imgui_backend_sea.py

@@ -341,11 +341,8 @@ def gui(app_state):
 # init imgui backend
 imgui.create_context()
 imgui_backend = ImguiWgpuBackend(device, render_texture_format)
-imgui_backend.io.display_size = canvas.get_logical_size()
-imgui_backend.io.display_framebuffer_scale = (
-    canvas.get_pixel_ratio(),
-    canvas.get_pixel_ratio(),
-)
+imgui_backend.io.display_size = present_context.logical_size
+imgui_backend.io.display_framebuffer_scale = (present_context.pixel_ratio,) * 2
 
 
 # register event handlers

pyproject.toml

@@ -30,7 +30,7 @@ tests = [
     "imageio",
     "anyio",
     "trio",
-    "rendercanvas",
+    "rendercanvas>=2.4.0",
 ]
 examples = ["pypng", "rendercanvas", "glfw"]
 docs = ["sphinx>7.2", "sphinx_rtd_theme"]

wgpu/utils/imgui/imgui_renderer.py

@@ -91,8 +91,8 @@ def __init__(self, device, canvas, render_target_format=None):
 
         self._backend = ImguiWgpuBackend(device, render_target_format)
 
-        self._backend.io.display_size = canvas.get_logical_size()
-        scale = canvas.get_pixel_ratio()
+        self._backend.io.display_size = self._canvas_context.logical_size
+        scale = self._canvas_context.pixel_ratio
         self._backend.io.display_framebuffer_scale = (scale, scale)
 
         canvas.add_event_handler(self._on_resize, "resize")
@@ -144,8 +144,8 @@ def render(self):
 
         imgui.set_current_context(self.imgui_context)
 
-        pixel_ratio = self._canvas_context.canvas.get_pixel_ratio()
-        lsize = self._canvas_context.canvas.get_logical_size()
+        pixel_ratio = self._canvas_context.pixel_ratio
+        lsize = self._canvas_context.logical_size
         self._backend.io.display_framebuffer_scale = (pixel_ratio, pixel_ratio)
         self._backend.io.display_size = lsize